(1)when a girl has such a fuckin loose pussy that when her legs are together u can see her loose pussy from behind, her pussy is visible in between her buttcheeks.
(2) a fuckin dipshit(3) Another way of saying, "SHIT!"

(1)Holy shit! dude her frickenjanbag got caught on the saddle when she rode that horse dude. Now her janbag is even looser!!!!!
(2)A rubber is a condom, janbag!
(3)AHHH JANBAG!! My nuts hurt so fricken bad!!